PSY354H5 Lecture Notes - Lecture 5: Conceptus, Secondary Sex Characteristic, Molecular Genetics
Document Summary
At ovulation, cell division in the oocyte is halted in the midst of meiosis ii. The cell division was not equal on daughter cell gets nearly all the cytoplasm: the egg starts to mature to an adult ovary. It starts the process of reproducing (diving into two cells), and then stops one is a cell, and the other is the first polar body. There is a series of events in terms of how sperm development themselves. One interesting thing is that the egg releases a chemical in which sperm has chemical receptors to detect this in order to find the egg. Fertilization, or conception, occurs when a single sperm enters a single egg to produce a zygote. Prior to fertilization, sperm must undergo two processes: capcitation: the sperm first entering the vagina and uterus. The outer surface of the sperm is digested by enzymes: acrosome reaction (ovum: zona pellucida)
